[in progress] draft implementation of Design

Looks like that for now

![capture d ecran 2014-10-01 a 16 44 46](https://cloud.githubusercontent.com/assets/335567/4476938/012e4ff0-497a-11e4-9a19-8f5f143e7a08.png)

Which not yet exactly what @awantulok  designed on https://github.com/jupyter/design/pull/4

Feel free to continue/use the PR this is mostly a test.